Some modification is needed to fit the RB67 Pro SD backs as the insert section of the back is slightly bigger. I have modified the Camo ZONE body but don't want to share the file on Thingiverse. Below is an image of the new dimensions. In Fusion 360 all you need to do is create a rectangle 83.80mm wide, place it 6.75mm above the mount face, then extrude up and across and much as you need to make the cutout using Combine > Cut. It will expose the slots for the viewfinder nuts a bit but it shouldn't be a major problem.
This modification should still allow mounting of the older backs.
Hey! this is rad any way you would share the file for it?
I have modified the body so that the Pro SD back can now also be used without any problems. In addition to an extended cutout, a small cutout for the additional nose of the Pro SD back has to be inserted so that it is centered on the camera.
Furthermore, I inserted a pocket for a light seal between the camera body and the back.
...I will ask Dora Goodman if I can send her the files so that she can offer them to all who are interested.